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Finding the Fourth Proportional to 645,817.70, 968,611.35 and 408,736.10

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Solution

The fourth proportional to 645,817.70, 968,611.35 and 408,736.10 is: 613,031.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,817.70 : 968,611.35 = 408,736.10 : x
  2. Step 2: Convert to fraction form
    645,817.70/968,611.35 = 408,736.10/x
  3. Step 3: Cross multiply
    645,817.70x = 968,611.35 × 408,736.10
  4. Step 4: Simplify right side
    645,817.70x = 395,906,425,614.74
  5. Step 5: Solve for x
    x = 395,906,425,614.74/645,817.70
  6. Step 6: Final answer
    x = 613,031.24

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.